DanCon: e.g. America/ChicagoDanCon: hmm... how to combine this with lat/long data, airport data etc...DanCon: hmm... how to say this in N3... "Each location in the database represents a national region where all clocks keeping local time have agreed since 1970. Locations are identified by continent or ocean and then by the name of the location, which is typically the largest city within the region. "DanCon: there seem to be some exceptions; e.g. America/Indiana/Indianapolis is 3-levels, not 2.DanCon: 100 point bounty for n3/cwm rules to convert a local time in any of the cities in the database to UTC.DanCon: for continents, we could use lat/long convex polygon approximations. countries, cities too.DanCon: for cities, one lat/long is probably enough... maybe a radius